Shingle-bracket.



F. C. NICKOL.

SHINGLE BRACKET.

APPLICATION FILED MARJ. 1914.

1 1 52, 1 1 8, l Patented Aug. 31, 1915.

rREDERIcK c. NICKOL, on

yr rnrnn STATES rA r Nr OFFICE.

snmenn-imncknr.

To all whom it may concern -,Be it known thatI, FREDERICK C. NICKOL, a citizen of the United States, residing at Dayton','in the county ofMontgomery and State of Ohio, have invented certain new and useful Improvements in-Shingle-Brackets, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to shingle brackets of that type commonly employed to support a scaffold upon a roof while the same is being shingled. As is well known it is necessary that a shingle scaffold should be moved up theroof step by step as where row after row ofshingles are applied to the roof. It is desirable that some support should be provided for-the scafiold which will enable it to be quickly and easily attached to and deta'chedfrom the roof and which will'not injure the shingles. Numerous devices for this purpose havebeen proposed and many of these were designed to grip one of the shingles which had already been applied to the roof and form a support against which the scaffold could rest. The form of scaffold most commonly employed is a beam or scantling which is supported edgewise on the roof and forms a brace or support against which the workman may brace himself, his body resting upon the roof. In use two or more of the brackets are attached to the roof and spaced apartsuitable distances and the scantlingplaced against the upper side of the brackets. Many of these devices propose to utilize the weighton the bracket to cause a gripping action on the shingle,

but nevertheless they commonly fail because of the insufliciency of this gripping action which results in the bracket slipping under heavy pressure. I

The object of the present invention isto provide a device of this character in which a verypowerful gripping action willbe had and the gripping member will be heldiin ,such a manner that it cannot spring or yield when in useand will not become distorted in such a manner as to lessen its efficiency after long use. a A further object is to so construct. the device that the gripping member may be locked in its operative position in such a 'manner that there willv be no danger of its releasing itself should the pressure thereon be relieved butwhich will; cause an in- Spccification of Letters Patent.

DAYTONLOHIO, AssIcNoRor CITE-HALF 'ro BERNARD, H. L ZIEHLEEQZF nAYroN,;OHIo.

Patented'Au 31, 1915,

' Application filed March 7, 1914. Serial No. 823,055.

creased, gripping action as the pressure on the I bracket increases.

. In .theaccompanying drawings, Figure 1 is alongitudinal,"sectional view, taken just inside one of the side members of a bracket embodying my invention; and Fig. 2 is a front endelevation of the device. 1

Infthese drawings I have illustrated one embodiment of .my invention and have shown thesameas comprising a base plate 1 adapted tohave its forward portion in.- serted beneath a shingle on the sloping roof of abuilding. Rigidly secured to the base plate on opposite sides thereof and projecting upwardly and forwardly are twoarms 21which, in the present instance, are formed integral with the base plate. The forward portions of these arms are 'spacedaway from the base plate 1, by cutting awaythe lower portions of the arms, so that theend. of the shingle beneath-which the base plate 1 has been projected may extend beneath the forward ends of the arms. Pivotally mounted .betweenthe arms or side members, 2,.ofthe device, this gripping portion consists of a downturned front end portion 5 which is serrated or providedwith teeth to enter the shingle and giveian eflicient gripping action. A pressure member or locking member is mounted on the arms 2 directly above the gripping portion of the clamping plate 3.

This locking member is here shown as a lever having its lower portion cam shaped,

as shown at 6,;and pivotally mounted be- .tween thearmsona shaft 7. In the present instance the lever has two of these cam shaped portions, one arranged near each of the side portions or arms 2.. Thelower camshaped portions of the lever'are ofsuch a character that when the upper portion or pressure arm 8 of the; lever is moved forward a portion of the cam having a short radius will be brought above the clamping plate. and it will be free to move upwar out of engagement with the shingle. A secend portion of the cam surfacelying immediately beyond the first-mentioned portionhasa radius of sucha length that when it is moved into contact 'with the clamping plate the teeth 5 will be forced into the shintion thereof so that the pressure will be exerted directly u'ponthe gripping portion, or teeth, and these teeth will be locked firmly in engagement with the shingle. V I-Ieretof'ore it has been common to project the gripping surface of the clamping member-"some dis tance beyond the pressure or looking member. As a result'theend' portion of the clamping member could spring upward and free itself or partially free itself when unusual pressure was exerted thereon by the scaffold. j Further, the repeated action of. the pressure device upon the plate between its ends tends to curve this'portion of the plate downwardly and lessen-the efiiciency of the gripping action of the teeth. By causing the pressure member or cam to bear upon theplate directly above the gripping portion thereof we not only prevent the distorting of the plate but exert a maximumof pressure on the gripping surface and prevent it from springingunder any circumstances whatever. That portion of the cam which rests upon theclar'npingplate when the pressure device is in its normal locking position issubstantially flat, as shownat 9, so that when the device has been moved into its locking position it"will be held in that position and cannot be released therefrom without the application of considerable pres sure to the upwardly extending'portion 8 of the lever. Consequently, the lever will not spring forward or otherwise loosen itself when the pressure. thereon is temporarily relieved. That part of thecam inthe rear of the flattened portion 9 thereon is of a gradually increasing radius so thatif unusual pressure is exerted upon the upper portionof the lever the latter will be, moved about its axis {a gradually increasing pressure exerted upon the gripping portion of the clampingplate, this pressure increasing in proportion to the weightresting upon the scaffold In the present forih of the device I have provided a spring 10 to autofrom the shingle. v f While I have'shown and described one embodiment-of the invention it will be unlever 8 and this pressure is held against accidental release. In actual practice it has been demonstrated that the shingle will break before the bracket will yield or' slip derstood that this has beenchosen" for the purposes of illustration-only and that I do not desire to be limited to thedetails of construction shown and described, for obvious 'modifications will occur to .a person arms arranged'on opposite sides of said base plate, having the lower edges of'their rear portions secured to said base plate and having their forward portions spaced away therefrom, a clamping plate arranged between said arms, pivotally connected thereto at its rear end and having its forward portion free to move toward and away from said base plate, a lever pivotally mounted between its ends onthe forward portions of said arms, having a cam-shaped lower part arranged to engage said forward portion of said clamping plate and also having an arm extending upwardly and forwardly from *the axis'of said lever and arranged to be engaged by ascaffold;

2: A device of the character described 'comprising base plate" having its forward end" adapted to extend beneatha shingle,

' arms arranged on opposite sides of said base plate, having, the lower edges of their rear portions secured to said baseplate and having their forward" portions spaced away therefrom, a clamping plate arranged between said arms,pivotally connected thereto at its rear end and having its forward portion freeto move toward and away from said base plate,- said forward portion being provided with depending prongs, a spring tending normally to elevate the forward portion .of said plate, a lever pivotally mounted between its ends on the forward portions of said arms and having camshaped lower parts arranged adjacent to the respective arms toengage the forward portion of said clamping plate directly above said prongs and also having an arm extending upwardly and forwardly from the axis thereof and arranged to be engaged by a scaffold.

3. A device of the character described comprising a base plate having its forward end adapted to extend beneath a shingle, arms arranged on opposite sides of said base plate, having the lower edges of their rear portions secured to said base plate and having their forward portions spaced away therefrom, a clamping plate arranged between said arms, pivotally connected there to at its rear end and having its forward portion free to move toward and away from said base plate, said forward portion being provided with depending prongs, a spring tending normally to elevate the forward portion of said plate, a lever pivotally mounted between its ends on the forward portions of said arms and having camportions to rest upon said clamping plate when the latter is in its normal clamping position and having those portions lying beyond said fiat portions of gradually increasing radii, whereby abnormal pressure upon said scaffold will cause an increase of pressure upon said clamping plate.

In testimony whereof, I afiix my signa ture in presence of two witnesses.

FREDERICK O. NICKOL.

Witnesses:

F. W. SOHAEFER, EDWARD L. REED.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

